<!DOCTYPE html><html><head>
  <title>Syntax and parsing of new pseudo-elements</title>
  <style type="text/css">
  ::selection { background: lime; }
  :selection { background: red; }
</style>
  <link rel="author" title="Ian Hickson" href="mailto:ian@hixie.ch">
  <link rel="help" href="https://www.w3.org/TR/css3-selectors/#selectors"> <!-- bogus link to make sure it gets found -->
  <meta name="flags" content=" interact">
 </head>
 <body>
 <p>Try selecting some text in this document. It should be have a green background.</p>

</body></html>